<template>
    <div class="chooser-component">
        <ul class="chooser-list">
          <li
          v-for="(item, index) in selections"
          @click="chosenSelection(index)"
          :title="item.label"
          :class="{active:index === nowIndex}"
          >{{ item.label }}</li>
        </ul>
      </div>
    </div>
</template>


<script>
export default {
  props:{
    selections:{
      type:Array,
      default:[
        {
          label: 'test',
          value:0
        }
      ]
    }
  },
  data () {
    return {
      nowIndex:0
    }
  },
  methods: {
      chosenSelection(index ){
        this.nowIndex=index
        {/*此处改变的告诉父组件*/}
        this.$emit('on-change',this.selections[index])
      }
  }
}
</script>

<style scoped>
.chooser-component {
  position: relative;
  display: inline-block;
}
.chooser-list li{
  display: inline-block;
  border: 1px solid #e3e3e3;
  height: 25px;
  line-height: 25px;
  padding: 0 8px;
  margin-right: 5px;
  border-radius: 3px;
  text-align: center;
  cursor: pointer;
}
.chooser-list li.active {
  border-color: #4fc08d;
  background: #4fc08d;
  color: #fff;
}
</style>
